Dust-cap for valve-stems.



E. L. AIKEN.

DUST CAP FOR VALVE STEMS.

APELIGM'ION FILED Nov. 24, 1913.

l 239 di 3;' ya Patentled Dec. 29, 1914.

amalfi/1101411,

EDWARD LINCOLN EKEN, 0F SPRINGFIELD, MASSACHUSETTS.

:increase ron vALvssTEMs.

Specification of Letters Patent.

Patented Dec. 29, 1914.

Application filed November 24, 1913. Serial No. 802,624.

'i719 all fic/ioni it may concern Be it known that I, lilmitxun L. Amies, a citizen of the 1United States. residing at Springfield. in the county of Hampden and State of Massachusetts, have invented cef."- tain'ncv,v and useful Improvements in Dust- Caps for Valve-Stems of which the follow ing is :i full, clear, and exact description.

It is 'customary in automobiles, bicycles and lthe liliy to carrythe tire valve stein through the felly of the wheel and to use, in connection therewith. a washer and a dust cap to secure the valve in place and protect it from weather and dirt and from blows to which it would otherwise he subjected. In the usual forms of appliance of this character, vboth the Washer and the dust cap are secured to the valve steam byscreiv threads, and the operation of attaching and removing the saine is, in consequence, a slow and somewhat inconvenient one.

The invention. subject of this application, is an improvement in such devices designed to hold the valve securely in place and protect it from injury, but which may be applied and removed at once with scarcely any manipulation, although in use it will not shake loose or become iinfastened, as the ordinary dust caps are liable to do.

To this end the invention consists of a washer correspondingr to that of the ordi# nary do 'ice which surrounds the projectingr valve stein, in combination with a dust cap containing a threaded collapsible sleeve which is contracted around the threaded valve stein by forcing the dust cap down over a projecting,y portion of the washer or valve and locking the saine thereto by turning,r the saine, to tighten the threads'or by .means of soine special forni of locking,- device, the contraction of the threaded sleeve beimr effected hycontact with a tapered inner surface in the projecting portion of the Washer.

The specic details of this construction may be greatly varied, but in the accompanyinpr drawings I have shown the improvement in the most practical form of which I am aware:

Figure l is a View in elevation ofthe improved dust cap attached in condition of use. Fig. 2 is a longitudinal section of the dust cap and Washer before application, and Fig. 3 a similar view of the same parte, in

.Sfcoiiditioir of use. A. in the drawing, represents the part corresponding to the ordinary washer. This part containsa recess on its under side to lit over a projection on the felly of the wheel. and comprises a cylindrical portion B with a flange. The inner sur- Y face of the cylindrical portion is beveled or c ap is formed or provided with a split portion containing a lug L which normally en-4 gages the groove D.

In using this device, the washer portion -and dust cap are passed overl the projecting valve stem and the dust cap forced down to drive the split sleeve or cylinder Gr into'the tapered portion of the nut. This causes the sleeve to clainp the valve stem and, necessary. the dust cap may be given a few turns to tighten it. rl`he cap is then turned until the lug L engages with the perforation E,

which holds the device securely in position.

The projection or lug L may readily be formed so that it may not be Withdrawn from engagement with the perforation E, except by turning the dust cap in the direc` tion of the arrow for the purpose of removingthe saine.

By means of this construction the user of the device'is enabled to instantly remove the valve or dust cap and the Washer instead ofy unscrewing each separately, as heretofore. The deviiffp is simple and not liable to'injiiry or weer and is exceedingly cheap and effective.

`What I claiin is:

l. A dust cap for va Ive stems comprising, iu combination, :i Washer for surrounding, the valve stein, a dust ca 3 havinga threaded collapsible sleeve vsecure therein, which, by' the union. of the cap and washer, is foifced into engagement with the valve stem by the configuration of the washer.

2. A dust cap for valve Steins, comprising,

ico

in combination, a washer for surrounding'105 the valve stem and having an interior tapered portion, a dust cap containing a collapsible threaded sleeve united thereto and which is forced by the tapered portion of the washer into engagement with the valve n@ stem by the union of the Washerv and dust cap, and means for lockin'githe dust cap to the Washer.

3. A dust cap for valve Stems, comprising, in combination, a Washer for surrounding thevztlve stern, and having an interior ta pered portion, a dust cap containing o. eollapsible threaded sieeve united thereto,

which is forced into engagement with. the

'mive stem by the tapered portion of the Washer when the dust oop and Washer are brought together, theA said washer being provided with n. lgroove and the dust cap with it projection by the enga-gement of 'Whifh the two are locked together.

inst cap for voire stems, Comprising, in combi tion, a washer having un interior )ow/ martiom u, dust (op containing a 'ended sieeeooliupsed bj.' the union of the washer and oop, and means for locking the washer anti sleeve together, :is set forth.

The nf'asher having inne" tapered. portion, in.. Combination with the dust oop containing o collapsible threaded sleeve "6,

ineens for looking the weeher and together, as set forth.

6. The Washer having an interior tapered fpm-tion and 2t recess, in combination with a dust cap containing afeoiipsihe contract the sleeve over a vo Ve Stem, as set lforth. i

8. A Washer having anv interior tapered portion, a groove arounci the outside ann L recess or perforation, in combination with a,

dust containing e. split and 'threaflef sleeve, und a spilt portion containing a ing or projeotion'for engngng with thehgroove y undy peroration 1n the nut, :is-and. or the p imposes set .for th.

n teetiinony Y'vhereof aix my signature in the presenee oi two su'eoribing Witnesses.

' EDT-WARD LNCLN AEGEE.

Witnesses: y

E Gro. MOSELEY, G, L. DRoLETrn.

y suieeve and :i ing or pjrogeotion for engaging with the 1 recess, to hold the nut end .eap together and 

